16144650561 has 16 divisors (see below), whose sum is σ = 23187173184. Its totient is φ = 9932979264.

The previous prime is 16144650551. The next prime is 16144650563. The reversal of 16144650561 is 16505644161.

It is a happy number.

It is not a de Polignac number, because 16144650561 - 2⁶ = 16144650497 is a prime.

It is a super-2 number, since 2×16144650561² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (16144650563) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 143455 + ... + 229931.

It is an arithmetic number, because the mean of its divisors is an integer number (1449198324).

Almost surely, 2^16144650561 is an apocalyptic number.

It is an amenable number.

16144650561 is a deficient number, since it is larger than the sum of its proper divisors (7042522623).

16144650561 is a wasteful number, since it uses less digits than its factorization.

16144650561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91280.

The product of its (nonzero) digits is 86400, while the sum is 39.

The spelling of 16144650561 in words is "sixteen billion, one hundred forty-four million, six hundred fifty thousand, five hundred sixty-one".